The numbers add up to this: Less and less opportunity for poor kids, By Marilyn Geewax, March 10, 2015, National Public Radio: “In this country, all children are supposed to have a shot at success — a chance to jump ‘from rags to riches’ in one generation. Even if riches remain out of reach, then the belief has been that every hard-working American should be able to go from poverty to the middle class. On Tuesday, a book and a separate study are being released — both turning up evidence that the one-generation leap is getting harder to accomplish in an economy so tied to education, technological know-how and networking…”